Malicious PDF — malware analysis report

Static analysis result for SHA-256 1552c7306a5941e4…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 02:49:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7a3bd59c13167f6d66d1be3c60eddb03 SHA-1: 8c13f11ad863d9f804612a953869abe81f45dfa4 SHA-256: 1552c7306a5941e413f7e513ef8313553b247fc3f9e4e1bb6a922f656bbafef8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The ML classifier strongly indicated maliciousness, and the document body, though garbled, contains references to game hacks and URLs. The primary attack pattern involves luring users to malicious sites via deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/roblox-free-pictures-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/lawn-mowing-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-jjsploit_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-play-paid-roblox-games-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pokemon-go-free-online-play_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/when-pokemon-go-free-will_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/bandicam-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hyper-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-para-hacker-todo-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF 23020 bytes
SHA-256: e381519ffff2b3ee349eec6845ff5938f6b8e7ca05e779aac4aa734242d113b0
font_01_sfnt_off000062e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 19168 bytes
SHA-256: c48f4e77c7a96d32e9dd7b82faaa5a6c8dbf6da526704fa9d826584e6c86669a

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